Position and function input system for large display

Abstract

Abstract PURPOSE: To obtain a display system using a pen light for radiating an optical beam which can be simultaneously resolved until a picture level on a display screen with divergence and without any damage. CONSTITUTION: A liquid crystal light bulb panel 12 controlled by a computer is arranged between a high luminance projecting lamp 14 focused by a fresnel lens 16 and a projecting lens 18, and a picture is enlarged and irradiated on a display screen 20. The picture on the screen is structured so as to be observed from any direction. When an infrared beam is spot-projected on a position designated on the screen picture with a wireless light pen 22, a large curvature reduction lens 24 is condensed through an IR filter 26 on a position detecting photodiode 28. This sensor detects the centroid of a light spot, X and Y coordinates are separated by using a proper device, and display on the projection screen 20 can be attained as a pointer.

Inventors

• 👤 Scott A Elrod
• 👤 スコット・エイ・エルロッド
• 👤 John Tang
• 👤 ジョン・タング
• 👤 Scott L Minneman
• 👤 スコット・エル・ミニマン
• 👤 B Jackson Warren
• 👤 ウォーレン・ビー・ジャクソン

Bibliographic Details